EP2261497A1 - Couvre-joint pour tuyau - Google Patents

Couvre-joint pour tuyau Download PDF

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Publication number
EP2261497A1
EP2261497A1 EP09729121A EP09729121A EP2261497A1 EP 2261497 A1 EP2261497 A1 EP 2261497A1 EP 09729121 A EP09729121 A EP 09729121A EP 09729121 A EP09729121 A EP 09729121A EP 2261497 A1 EP2261497 A1 EP 2261497A1
Authority
EP
European Patent Office
Prior art keywords
pipe
divided
high pressure
pressure fuel
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09729121A
Other languages
German (de)
English (en)
Other versions
EP2261497A4 (fr
EP2261497B1 (fr
Inventor
Ryuhei Nishida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nifco Inc
Original Assignee
Nifco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nifco Inc filed Critical Nifco Inc
Publication of EP2261497A1 publication Critical patent/EP2261497A1/fr
Publication of EP2261497A4 publication Critical patent/EP2261497A4/fr
Application granted granted Critical
Publication of EP2261497B1 publication Critical patent/EP2261497B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2201/00—Special arrangements for pipe couplings
    • F16L2201/20—Safety or protective couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L35/00—Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices

Definitions

  • This invention relates to a pipe connector cover for covering a connector of a high pressure fuel pipe, for example, of a diesel engine, so that fuel that sprays from the connector of the high pressure fuel pipe does not disperse to the surroundings.
  • This pipe connector cover is constituted by two protective elements that form a closed chamber for enclosing fuel that leaks from the connector, a discharge port that is provided on one of these two protective elements, and a discharge pipe section that extends from this discharge port and is used for allowing fuel inside the closed chamber to flow to the outside. Also, a seal part made of soft material is provided on the oppositely facing end of each protective element (for example, see pamphlet of International Application No. 2006/059050 ).
  • This invention was created in order to solve the abovementioned problem, and the object is to provide a pipe connector cover for which the installation operation is simple and with which it is possible to assuredly prevent leaking (spraying) fuel from dispersing to the surroundings.
  • the substance thereof is as follows:
  • a pipe connector cover for covering a connector of a high pressure fuel pipe of an engine, in which one end of a cylindrical cover part is blocked by a blocking part that has a pipe insertion hole, wherein the aforementioned blocking part includes a seal part in which an inner perimeter that forms the aforementioned pipe insertion hole is adhered closely to an outer perimeter of the aforementioned high pressure fuel pipe, and a receiving chamber that is positioned outside of this seal part, is open on a lower face, and is used for receiving fuel that sprays from the aforementioned connector; and a lower end of a receiving chamber outer wall that forms this receiving chamber is contacted with an upper surface of a fastening tool that constitutes the aforementioned connector.
  • the blocking part is provided on only one end of the cylindrical cover part, it is possible to install the pipe connector cover on a section of the high pressure fuel pipe avoiding the connector of the high pressure fuel pipe, and then to move the pipe connector cover along the high pressure fuel pipe to cover the connector of the high pressure fuel pipe with the pipe connector cover.
  • the receiving chamber is provided around the entirety of the outer perimeter of the high pressure fuel pipe or in an arc form on the outer perimeter of the high pressure fuel pipe, and because an outer surface of the seal part has an inclined surface that approaches the high pressure fuel pipe as it goes toward the connector, (the pressure of) the fuel leaking from the connector acts on the inclined surface of the seal part, whereby (the inner perimeter of) the seal part is adhered more closely to the outer perimeter of the high pressure fuel pipe, and therefore the seal quality can be improved.
  • the seal quality of the seal part is improved, and even when the lower end of the receiving chamber outer wall moves back and forth against the fastening tool, there is no noise made from the lower end of the receiving chamber outer wall hitting the fastening tool.
  • the fastening tool with an insertion-coupling receiving part capable of coupling is provided inside the other end of the cover part, it is possible to install the pipe connector cover in a manner so as not to rotate in the circumferential direction of the high pressure fuel pipe, by insertion-coupling the fastening tool into the insertion-coupling receiving part.
  • the pipe connector cover is constituted by divided pipe connector covers that are divided into two parts on a plane parallel to the axial direction of the high pressure fuel pipe, and because each of these divided pipe connector covers is provided with a catch-coupling part and a catch-coupling receiving part for integrally coupling the two parts, it is possible to install the pipe connector cover on the high pressure fuel pipe by positioning the high pressure fuel pipe between the two divided pipe connector covers, holding the high pressure fuel pipe between the two divided pipe connector covers, and catch-coupling each catch-coupling part to the corresponding catch-coupling receiving part, and therefore the installation of the pipe connector cover on the high pressure fuel pipe becomes simpler.
  • FIG. 1 shows a exploded perspective view of a pipe connector cover which is one working example of this invention
  • FIG. 2 shows a plan view of the divided cover part shown in FIG. 1
  • FIG. 3 shows a front view of the divided cover part shown in FIG. 2
  • FIG. 4 shows a back view of the divided cover part shown in FIG. 2
  • FIG. 5 shows a right side view of the divided cover part shown in FIG. 2
  • FIG. 6 shows a sectional view along the A-A line in FIG. 2
  • FIG. 7 shows a sectional view along the B-B line in FIG. 3
  • FIG. 8 shows a sectional view along the C-C line in FIG. 3
  • FIG. 9 shows a cut-away end view along the D-D line in FIG. 3 .
  • FIG. 10 shows a plan view of the divided blocking part shown in FIG. 1
  • FIG. 11 shows a front view of the divided blocking part shown in FIG. 10
  • FIG. 12 shows a back view of the divided blocking part shown in FIG. 10
  • FIG. 13 shows a bottom view of the divided blocking part shown in FIG. 10
  • FIG. 14 shows a right side view of the divided blocking part shown in FIG. 10
  • FIG. 15 shows a sectional view along the E-E line in FIG. 11
  • FIG. 16 shows a sectional view along the F-F line in FIG. 11 .
  • FIG. 17 shows a perspective view of the condition when each member shown in FIG. 1 is connected together as a pipe connector cover
  • FIG. 18 shows a plan view of the pipe connector cover shown in FIG. 17
  • FIG. 19 shows a front view of the pipe connector cover shown in FIG. 18
  • FIG. 20 shows a bottom view of the pipe connector cover shown in FIG. 18
  • FIG. 21 shows a right side view of the pipe connector cover shown in FIG. 18
  • FIG. 22 shows a sectional view along the G-G line in FIG. 18
  • FIG. 23 shows a cut-away end view along the H-H line in FIG. 19
  • FIG. 24 shows a sectional view along the I-I line in FIG. 19
  • FIG. 25 and FIG. 26 show explanatory drawings of the installation of the pipe connector cover.
  • the reduced scale is different between the divided cover part shown in FIG. 2 - FIG. 9 and the divided blocking part shown in FIG. 10 - FIG. 16 .
  • the pipe connector cover C which is one working example of this invention, is a cover for covering a connector of a high pressure fuel pipe of an engine as an example, and it constitutes a cover part 11, and a blocking part 21 for blocking one end (upper end) of the cover part 11, as shown in FIG. 1 .
  • the cover part 11 comprises divided cover parts 12A, 12B, which are divided into two parts on a plane parallel to the axial direction. It is preferable that the divided cover parts 12A, 12B be manufactured, for example, by molding hard synthetic resin.
  • the divided cover part 12A is of the same constitution as the divided cover part 12B, and these are connected together to become cylindrical.
  • the blocking part 21 comprises divided blocking parts 22A, 22B, which are divided into two parts on a plane parallel to the axial direction. It is preferable that the divided blocking parts 22A, 22B be manufactured, for example, by molding soft synthetic resin.
  • the divided blocking part 22A is of the same constitution as the divided blocking part 22B, and these are connected together to constitute an annular blocking part 21. Also, the inner perimeter of the blocking part 21 becomes a pipe insertion hole 23 (see FIG. 18 ).
  • a divided pipe connector cover 42A constitutes the divided cover part 12A, and the divided blocking part 22A, which is installed in this divided cover part 12A.
  • a divided pipe connector cover 42B constitutes the divided cover part 12B, and the divided blocking part 22B, which is installed in this divided cover part 12B.
  • a divided insertion-coupling receiving annular part 13A (13B), which comprises two divided annular protruding parts 13a1, 13a2 (13b1, 13b2), above and below, and one divided annular recessed part 13a3 (13b3) positioned between these two divided annular protruding parts 13a1, 13a2 (13b1, 13b2).
  • a divided insertion-coupling receiving part 14A 14B
  • a fixing nut 71 see FIG. 25 and FIG. 26 .
  • the catch-coupling projection 15a1 (15b1) and the catch-coupling projection 15a2 (15b2) are one example of the catch-coupling part of the present invention, and they are provided above and below so as to project from the outside surface, as shown in FIG. 2 - FIG. 5, FIG. 7 , or FIG. 8 .
  • an insertion hole 16A1 (16B1) and an insertion hole 16A2 (16B2) are provided above and below.
  • a catching part 17A1 (17B1) and a catching part 17A2 (17B2) are provided above and below.
  • the catching part 17A1 (17B1) and the catching part 17A2 (17B2) are one example of the catch-coupling receiving part of the present invention.
  • a catch-coupling piece 15B1 (15A1) is inserted into the insertion hole 16A1 (16B1), and a catch-coupling piece 15B2 (15A2) is inserted into the insertion hole 16A2 (16B2). Also, the catch-coupling projection 15b1 (15a1) is caught in the catching part 17A1 (17B1), and the catch-coupling projection 15b2 (15a2) is caught in the catching part 17A2 (17B2).
  • the blocking part 21, in which the abovementioned divided blocking parts 22A (22B) are connected together, is constituted by an insertion-coupling annular part 24 (see FIG. 10 - FIG. 16 ), a receiving chamber outer wall 28 (see FIG. 11 - FIG. 14 and FIG. 16 ), and connecting walls 30L, 30R (see FIG. 11 and FIG. 13 ). Also, inside the blocking part 21, as shown in FIG. 11 , FIG. 13 , and FIG. 16 , there is seal part 26, which is roughly circular in sectional shape orthogonal to the axial direction, and is formed so that the sectional shape gradually becomes smaller as it goes from top to bottom.
  • the insertion-coupling annular part 24 is a circular annular projection that is formed on the outer perimeter of the blocking part 21 (divided blocking parts 22A, 22B). This insertion-coupling annular part 24 is insertion-coupled into the divided insertion-coupling receiving annular part 13A (13B) of the divided cover part 12A (12B).
  • the receiving chamber outer wall 28 is a circular annular projection that projects downward from the bottom of the blocking part 21.
  • the connecting walls 30L, 30R connect two ends in the circumferential direction of the receiving chamber outer wall 28 and two corresponding ends in the circumferential direction of the seal part 26 by two ends in the circumferential direction of the insertion-coupling annular part 24.
  • a divided receiving chamber 31 is formed by the connecting walls 30L, 30R, the insertion-coupling annular part 24, the seal part 26, and the receiving chamber outer wall 28. Also, the lower face of the divided receiving chamber 31 is open.
  • a divided insertion-coupling recessed part 25 into which the divided annular protruding parts 13a1 (13b1) of the divided cover part 12A (12B) are insertion-coupled.
  • the inner perimeter surface and the outer perimeter surface (outer surface) of the seal part 26 are a conical surface 27i and a conical surface (inclined surface) 27o, which respectively approach the high pressure fuel pipe, inserted into the pipe insertion hole 23, as they progress downward.
  • a plurality of cut-outs 29, which function as open parts, are provided in the circumferential direction.
  • the pipe connector cover C which is one working example of this invention, is used for covering a connector U shown in FIG. 25 as an example.
  • This connector U includes a connecting cylinder part 52 provided on a common rail 51, and a fixing nut 71, which is a fastening tool for fixing a high pressure fuel pipe 61 to the connecting cylinder part.
  • a conical surface 53 that becomes narrower toward the center below is provided as a connecting surface on the front end (upper end), and a threaded hole 54 is provided on the outer perimeter of the front end (upper part).
  • a thick part 62 which has a conical surface (connecting surface) 63 that widens from bottom to top for contacting with the conical surface 53 of the connecting cylinder part 52.
  • the divided insertion-coupling recessed part 25 provided on the insertion-coupling annular part 24 of the divided blocking part 22A is insertion-coupled to the divided annular protruding part 13a1 constituting the divided insertion-coupling receiving annular part 13A of the divided cover part 12A, and the lower side of the divided annular insertion-coupling part 24 is insertion-coupled into the divided annular recessed part 13a3 constituting the divided insertion-coupling receiving annular part 13A, whereby the divided blocking part 22A is installed on the divided cover part 12A.
  • the divided insertion-coupling recessed part 25 provided on the insertion-coupling annular part 24 of the divided blocking part 22B is insertion-coupled to the divided annular protruding part 13b1 constituting the divided insertion-coupling receiving annular part 13B of the divided cover part 12B, and the lower side of the divided annular insertion-coupling part 24 is insertion-coupled into the divided annular recessed part 13b3 constituting the divided insertion-coupling receiving annular part 13B, whereby the divided blocking part 22B is installed on the divided cover part 12B.
  • the catch-coupling pieces 15B1, 15B2 of the divided cover part 12B are placed opposite the insertion holes 16A1, 16A2 of the divided cover part 12A, and the catch-coupling pieces 15A1, 15A2 of the divided cover part 12A are placed opposite the insertion holes 16B1, 16B2 of the divided cover part 12B, and then the divided cover parts 12A, 12B (divided pipe connector covers 42A, 42B) are brought closer to each other. Also, the catch-coupling pieces 15B1, 15B2 are inserted into the insertion holes 16A1, 16A2, and the catch-coupling pieces 15A1, 15A2 are inserted into the insertion holes 16B1, 16B2.
  • the catch-coupling projections 15a1, 15a2, 15b1, 15b2 bend inward by the elasticity of the catch-coupling pieces 15A1, 15A2, 15B1, 15B2, and upon passing through the insertion holes 16B1, 16B2, 16A1, 16A2, return to the original state (outward) by the elasticity of the catch-coupling pieces 15A1, 15A2, 15B1, 15B2.
  • the catch-coupling projections 15a1, 15a2, 15b1, 15b2 are respectively catch-coupled into the catching parts 17B1, 17B2, 17A1, 17A2, and the pipe connector cover C can be assembled as shown in FIG. 17 - FIG. 24 .
  • the pipe connector cover C when the pipe connector cover C is assembled, it can be put into a condition in which at least the divided blocking parts 22A, 22B are closely adhered together, and there is no gap between the divided blocking part 22A and the divided blocking part 22B.
  • a high pressure fuel pipe 61 is positioned between the divided cover parts 12A, 12B and the blocking parts 22A, 22B on a section of the high pressure fuel pipe 61 avoiding the connector U of the high pressure fuel pipe 61, that is, away from the connector U of the high pressure fuel pipe 61, and the pipe connector cover C is assembled as described above, whereby the pipe connector cover C can be installed on the high pressure fuel pipe 61 in a condition in which the high pressure fuel pipe 61 is positioned inside the pipe insertion hole 23.
  • the pipe connector cover C is moved along the high pressure fuel pipe 61 in a condition in which the inner perimeter of the seal part 26 is in contact with the outer perimeter of the high pressure fuel pipe 61, and the part above the fixing nut 71 is insertion-coupled into the divided insertion-coupling parts 14A, 14B as shown in FIG. 24 , then the pipe connector cover C is pushed downward, and the lower end of the receiving chamber outer wall 28 is placed in contact with the upper face of the fixing nut 71, whereby the connector U can be covered by the pipe connector cover C as shown in FIG. 26 .
  • each divided receiving chamber 31 liquefies in contact with the pipe connector cover C (each insertion-coupling annular part 24, each divided sheet part 26, each divided receiving chamber outer perimeter wall 28, and each connecting wall 30L, 30R), is discharged from each cut-out 29 to the outside of each divided receiving chamber 31, and flows down between the divided cover parts 12A, 12B and the fixing nut 71.
  • the blocking part 21 is provided on only one end of the cylindrical cover part 11, it is possible to install and position the pipe connector cover C on a section of the high pressure fuel pipe 61 avoiding the connector U of the high pressure fuel pipe 61, and then to move the pipe connector cover C along the high pressure fuel pipe 61 to cover the connector U of the high pressure fuel pipe 61 with the pipe connector cover C.
  • connectors U of high pressure fuel pipes 61 is proximal, it is possible to install the pipe connector cover C in a manner so as to cover each connector U of the high pressure fuel pipes 61, by installing and positioning the pipe connector cover C on a section of the high pressure fuel pipe 61 away from the connector U of the high pressure fuel pipe 61, and then moving the pipe connector cover C along the high pressure fuel pipe 61, and therefore the installation operation for the pipe connector cover C becomes simple.
  • the fuel sprays as a high-temperature, high-pressure mist toward one direction, for example, from between the high pressure fuel pipe 61 and the fixing nut 71. Accordingly, with the pipe connector cover C of the present working example, it is possible to assuredly prevent the sprayed fuel from dispersing to the surroundings, by providing the blocking part 21 on only one end of the cylindrical cover part.
  • a cut-out 29 is provided on the receiving chamber outer wall 28, it is possible to actively discharge fuel that leaks from the connector U of the high pressure fuel pipe 61 and liquefies in contact with the pipe connector cover C to the outside of the receiving chamber 31.
  • the divided receiving chamber 31 is provided in an arc form on the outer perimeter of the high pressure fuel pipe 61, and because the outer surface of the seal part 26 has a conical surface (inclined surface) 27o that approaches the high pressure fuel pipe 61 as it goes toward the connector U, (the pressure of) the fuel leaking from the connector U acts on the conical surface 27o of the seal part 26, whereby (the inner perimeter of) the seal part 26 is adhered more closely to the outer perimeter of the high pressure fuel pipe 61, and therefore the seal quality can be improved.
  • the seal part 26 and the receiving chamber outer wall 28 are formed with a soft material, the seal quality of the seal part 26 is improved, and even when the lower end of the receiving chamber outer wall 28 moves back and forth against the fixing nut 71, there is no noise made from the lower end of the receiving chamber outer wall 28 hitting the fixing nut 71.
  • insertion-coupling receiving parts 14A, 14B, into which the fixing nut 71 is insertion-coupled, are provided inside the other end of the cover part 11, it is possible to install the pipe connector cover C in a manner so as not to rotate in the circumferential direction of the high pressure fuel pipe 61, by insertion-coupling the fixing nut 71 into the insertion-coupling receiving parts 14A, 14B.
  • the divided blocking parts 22A, 22B can be connected in an annular form with no gap in between, and the divided seal parts 26 can be connected in an annular form with no gap in between.
  • the pipe connector cover is constituted by divided pipe connector covers 42A, 42B that are divided into two parts on a plane parallel to the axial direction of the high pressure fuel pipe 61, and because each of these divided pipe connector covers 42A, 42B is provided with catch-coupling projections 15a1, 15a2, 15b1, 15b2 and catching parts 17A1, 17A2, 17B1, 17B2 for integrally coupling the two parts, it is possible to install the pipe connector cover C on the high pressure fuel pipe 61 by placing the high pressure fuel pipe 61 between the two divided pipe connector covers 42A, 42B, holding the high pressure fuel pipe 61 between the two divided pipe connector covers 42A, 42B, and catch-coupling the catch-coupling projections 15a1, 15a2, 15b1, 15b2 to the corresponding catching parts 17B1, 17B2, 17A1, 17A2, and therefore the installation of the pipe connector cover C on the high pressure fuel pipe 61 becomes simpler.
  • the divided pipe connector covers 42A, 42B are divided into divided cover parts 12A, 12B and divided blocking parts 22A, 22B, it is possible to separately manufacture the divided cover parts 12A, 12B, for which mainly mechanical strength is required, and the divided blocking parts 22A, 22B, for which mainly seal quality is required, and therefore the divided pipe connector covers 42A, 42B can be manufactured easily.
  • the open part provided on the receiving chamber outer wall 28 was made as a cut-out 29, but the open part may be an opening, hole, or the like.
  • the cut-out (open part) 29 was provided on the receiving chamber outer wall 28 that contacts with the upper face of the fixing nut (fastening tool) 71, but liquefied fuel is discharged to the outside of the divided receiving chamber 31 from a gap between the receiving chamber outer wall 28 and the fixing nut (fastening tool) 71 even when an opening is not provided on the receiving chamber outer wall 28.
  • the divided pipe connector covers 42A, 42B were constituted by divided cover parts 12A, 12B and divided blocking parts 22A, 22B, but the divided cover part 12A (12B) and the divided blocking part 22A (22B) also may be integrally constituted by two-color molding, or the like.
  • pipe connector cover C was constituted by two divided pipe connector covers 42A, 42B, but the pipe connector cover C also may be integrally constituted (one part).
  • the divided pipe connector covers 42A, 42B are two-color molded, or when the pipe connector cover C is integrally constituted (one part), it is preferable that at least the seal part 26 and the lower end of the receiving chamber outer wall 28 be formed with a soft material.
  • the receiving chamber may be provided in an arc form on the outer perimeter of the high pressure fuel pipe 61 as in the abovementioned working example, or it may be provided in an annular form around the entirety of the outer perimeter of the high pressure fuel pipe 61.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Gasket Seals (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP09729121A 2008-04-02 2009-04-02 Couvre-joint pour tuyau Not-in-force EP2261497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008096173A JP5103249B2 (ja) 2008-04-02 2008-04-02 パイプ接合部カバー
PCT/JP2009/056903 WO2009123291A1 (fr) 2008-04-02 2009-04-02 Couvre-joint pour tuyau

Publications (3)

Publication Number Publication Date
EP2261497A1 true EP2261497A1 (fr) 2010-12-15
EP2261497A4 EP2261497A4 (fr) 2011-05-18
EP2261497B1 EP2261497B1 (fr) 2012-07-18

Family

ID=41135658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09729121A Not-in-force EP2261497B1 (fr) 2008-04-02 2009-04-02 Couvre-joint pour tuyau

Country Status (9)

Country Link
US (1) US20110084476A1 (fr)
EP (1) EP2261497B1 (fr)
JP (1) JP5103249B2 (fr)
KR (1) KR101217360B1 (fr)
CN (1) CN101983286B (fr)
BR (1) BRPI0910417B1 (fr)
ES (1) ES2389863T3 (fr)
MX (1) MX2010010719A (fr)
WO (1) WO2009123291A1 (fr)

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GB2588693A (en) * 2019-10-28 2021-05-05 Bamford Excavators Ltd A fastener assembly

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Also Published As

Publication number Publication date
EP2261497A4 (fr) 2011-05-18
KR101217360B1 (ko) 2012-12-31
US20110084476A1 (en) 2011-04-14
BRPI0910417A2 (pt) 2019-05-14
BRPI0910417B1 (pt) 2020-04-07
JP2009250064A (ja) 2009-10-29
WO2009123291A1 (fr) 2009-10-08
ES2389863T3 (es) 2012-11-02
MX2010010719A (es) 2011-03-02
EP2261497B1 (fr) 2012-07-18
KR20100116687A (ko) 2010-11-01
CN101983286A (zh) 2011-03-02
JP5103249B2 (ja) 2012-12-19
CN101983286B (zh) 2012-12-19

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